TW200422152A - Slide miter saw - Google Patents

Abstract

A miter saw includes a base, a table, a support housing connected to the table, at least one rail slidably connected to the support housing, a trunnion disposed on the at least one rail, a saw assembly pivotally attached to the trunnion and movable between a front position and a rear position, the saw assembly comprising a motor and a blade driven by the motor, and a return mechanism disposed on one of the trunnion and the support housing for returning the saw assembly to the rear position. The return mechanism may include a spool, a cable disposed on the spool, and a spring for biasing the spool to a first rotational position, the cable being connected to the other of the trunnion and the support housing.

Description

Ii. Description of the invention: The statement of this invention benefits from the tentative application No. 60 / 411,977, filed on U.S. 19, 2002, and under review. [Technical field to which the invention belongs] The present invention generally relates to sliding cutters, and more particularly, to the arrangement of vehicles for sliding cutters. [Prior art] * Sliding cutters are well known in the art, because they provide a longer cutting range than non-sliding cutters. Sliding cutting machine has a base, a rotatable table with a base, a cutting assembly containing a motor and a saw blade driven by a motor, like a non-sliding cutting machine. Pivot to cut off a workpiece arranged on the base and the table. However, the sliding cutter allows the user to move the cutting assembly horizontally along the table. Most sliding cutters are formed by connecting the cutting assembly to at least one rail (τ, and this rail is slidably attached to a support cover connected to the table top (see, for example, U.S. No. 6,67,885). (Patent). According to this configuration, the user can pull the cutting assembly forward, move the cutting assembly downward, and then push the cutting assembly backward to cut the workpiece. [Summary of the Invention] According to the present invention, an improvement is adopted The cutting machine includes a base, a table, a support cover connected to the table, and first and second rails of the sliding connection support cover. The first and second rails have different hardnesses and are arranged in the first section. A trunnion on a first and second rail, a cutting assembly pivotally connected to the trunnion and movable between a forward position and a rear k position, the cutting assembly includes a motor and a saw driven by a 87749 motor Piece, the first bearing arranged under the-rail, and the first and second bearings of the first, second, and third bearings between the support cover and the-rail on the arranged one rail are -Luo Er = 罘 一 轨 条, while the other first, Sang Yi Sang Yi Zhi to lock contact with the-track The second material is biased by the second screw and will be easier to understand from the drawings and the following detailed description of additional features and advantages of the present invention. [Embodiment] The invention will now be described with reference to the drawings, in which the same numerals represent the same Parts. Refer to Figure-The sliding cutter 10 preferably has-a base u, a table 12 rotatably connected to the base u,-a support pivotally connected to the table 12, two rails 15 slidably connected to the support cover 14 , A trunnion 16 connected to one end of the rail 15, and a cutting assembly pivotally connected to the trunnion 16 by a pivot arm nA, the cutting assembly includes a motor 20 and a saw blade driven by the motor 9 An upper protection piece 17 covering the upper part of the saw blade 19 and a lower protection piece pivoting the upper part of the saw blade 丨 for holding down the lower protection piece 18 of the saw blade 19. The sliding cutter 10 It may have a guard plate 13 with a base 11. These elements are well known in the art. Those skilled in the art may refer to US Patent No. 6,067,885, which is incorporated herein by reference in its entirety. Generally speaking, cutting machines Rails of the same hardness. However, rails of different hardness are used It is cheaper because the soft rail is cheaper than the hard rail. Therefore, the cutting machine 10 has a hard rail 15H and a soft rail 15S. Preferably, the hard rail 15H has a hardness between about 58 HRC and about 62 HRC. The soft rail 15S May have a hardness of less than about 58 HRC and preferably less than about 50 HRC. In the preferred embodiment 87749 200422152, the hard rail 15H and the soft rail 15S may be made of chrome-plated hard steel and chrome-plated soft steel, respectively. The hard rail 15H may slide Connected to the support cover 14. A bearing 38 can be placed between the hard rail 15H and the support cover 14 to enhance the sliding effect of the hard rail 15H corresponding to the support cover 14. Preferably, the bearing 38 is a rotary linear ball bearing. Similarly, The soft rail 15S is slidably connected to the support cover 14 and is slidably arranged in the channel 14C of the support cover 14. A bearing may be arranged between the soft rail 15S and the support cover 14 to enhance the sliding action of the soft rail 15S corresponding to the support cover 14. Although this type of bearing can be a rotary linear ball bearing, it is better to use a cheaper alternative. One possible arrangement includes bearings 31, 32 and 34, which are preferably made of powdered bronze metal. The bearing 31 is preferably arranged on the protruding surface 14B of the support cover 14 below the soft rail 15S. As for the classics, those skilled in the art should know that the protrusion 1 can be replaced by extending the screw into the channel 14c. In addition, the bearing 34 may be disposed on the soft rail 15S. A locking bolt 35 rotating with the support cover 14 can press the bearing 34 toward the soft rail 15S. Therefore, if the user wants to lock the rail 15 so that the cutting assembly cannot slide relative to the table 12, the user only needs to tighten the locking bolt 35. Since the lock bolt 35 does not directly contact the soft rail 15S, any material can be used for the lock bolt because the lock bolt 35 does not hurt the soft rail 15S. Therefore, the lock bolt 35 may be made of a steel material instead of a material such as brass. Those skilled in the art should understand that the bearing 34 can be placed under the soft rail 15S. Similarly, the bearing 32 is preferably arranged on the soft rail 15S. A fixing screw 33 screwed to the support cover 14 can press the bearing 32 toward the soft rail 15S (which can then press 87749 200422152 soft rail 15S toward the bearing 31). Since the fixing screw 33 does not directly contact the soft rail 15S ', any material can be used for the fixing screw 33 because the fixing screw 33 does not hurt the soft rail 15S. Those skilled in the art should understand that if at least one bearing 31 is placed on the fixing screw, the bearing 32 may be placed on the protruding surface. The bearings 31, 32, 34 may have dust through holes to help move the dust away from the area where the bearing contacts the soft rail 15S. Referring to Fig. 4, the bearing 31 has a through hole 31C arranged below the contact surface 31A. The through hole 31C is preferably substantially perpendicular to the longitudinal axis of the soft rail i5s and / or the moving direction A of the vertical soft rail 15S. Those skilled in the art should understand that the dust through holes can also be arranged on the bearings 32 and 34. Preferably, the bearings 32, 34 are substantially coplanar.包 _ 承 之 平面, preferably about 4 vertical planes. Those skilled in the art will appreciate that this plane can be substantially horizontal. Those skilled in the art should also understand that the bearings 3 j may have the same size to reduce the number of different parts used in the cutting machine. The support cover 14 is preferably made of _. In order to ensure that the axis ㈣ is substantially positive, it is better to pass through the fine turning. This can be obtained by boring along the space as shown in Figure 2. This boring operation is even more suitable, because it can simultaneously finish the protruding surface UB and remove any bad parts that may touch the soft rail. The artist may recognize other additives or alternatives for use in the devices disclosed herein. However, all soils are equivalent to the present invention. "0 items and / or substitutes are all regarded as [Schematic description] Its: The figure illustrates the preferred embodiment of the present invention according to the actual application of the present invention, 87749 200422152 Fig. 1 is a diagram of a sliding cutter according to the present invention Side view;-Figure 2 is a partial cross-sectional view taken along the II-II line in Figure 1; Figure 3 is a partial cross-sectional view taken along the III-III line in Figure 2; and Figures 4A-4C schematically show a basis 4A-4C of the bearing of the present invention are the side view, front view, and top view of the bearing respectively. [Illustration of Representative Symbols of Drawings] 10 Sliding Cut-off Machine 11 Base 12 Table Surface 13 Guard Plate 14 Support Cover 14B Protruding Surface 14C Channel 15 Rail 15H Hard rail 15S Soft rail 16 Trunnion 17 Saw blade upper guard 17A Frame arm 18 Saw blade lower guard 19 Saw blade 20 Motor 31 Bearing 31A Contact surface 87749-10- 200422152 31C Through hole 32 Bearing 33 Fixing screw 34 Bearing 35 Lock bolt 38 Bearing MB MB A Direction of movement 87749-11-

Claims (1)

200422152 The scope of patent application: 1. 2. A cutting machine, including: a base; a table, which is rotatably arranged on the base; a support cover 'connected to the table; the first and second rails, It is slidably connected to the support cover; a trunnion, which is arranged on the first and second rails; a cutting assembly, which is pivotally connected to the trunnion, and moves between a forward position and a rear position, The cutting assembly includes-the motor and-the saw blade driven by the motor; a first bearing arranged below the first rail; and a second and third bearing arranged on the first rail and interposed between the supports Between the cover and the first rail, one of the ', middle, first, and third bearings is deflected by a first screw to: touch the first rail, and the other second and third bearings are A second screw is offset to lock the first rail. The cutting machine according to the scope of the patent application, wherein the first bearing has a through hole to v, which is substantially perpendicular to the longitudinal axis of the first rail. 3. According to the cutting machine in the scope of patent application, the first and second rails in Langzhong have different hardness. 4. According to the cutting machine in the scope of patent application No. 1, the middle-bearing is arranged on a protruding surface in the support cover. 5. According to the cutting machine in the scope of patent application No. 4, the raised surface of λ is finished when the support cover is sintered. 87749 200422152 6. The cutting machine according to item 1 of the patent application includes a fourth bearing arranged below the first rail. 7. The cutting machine according to item 6 of the patent application scope, wherein the fourth bearing is arranged on a protruding surface in the support cover. 8. The cutting machine according to item 7 of the scope of patent application, wherein the protruding surface is finished when the support cover is sintered. 9. According to the cutting machine in the scope of patent application, the first rail is softer than the second rail. 10. The cutting machine according to item 1 of the scope of patent application, further comprising a fifth bearing arranged in the support cover, the fifth bearing contacting the second rail. 11. The cutting machine according to item 10 of the patent application scope, wherein the fifth bearing is a revolving linear bearing. 12 · The cutting machine according to the scope of the patent application, where the fifth bearing is a rotary linear bearing. 13. The cutting machine according to item 1 of the scope of patent application, wherein at least one of the first, second and third bearings is made of powder bronze metal. 14. The cutting machine according to item 1 of the scope of patent application, in which one plane transfers the first, first and third bearings. 15. The cutting machine according to item 14 of the scope of patent application, wherein the plane is substantially a vertical plane. 16. The cutting machine according to item 14 of the patent application, wherein the plane is substantially horizontal. -2 · 87749